A student does eye exercises at a “Red Army” elementary school in China’s Guizhou province. Part 1 optometrists in Hong Kong are the gatekeepers to detecting, diagnosing and treating avoidable eye and vision problems. Photo: AFP

A student does eye exercises at a “Red Army” elementary school in China’s Guizhou province. Part 1 optometrists in Hong Kong are the gatekeepers to detecting, diagnosing and treating avoidable eye and vision problems. Photo: AFP